The Block Rockit is new, so you're probably not going to be able to find gently used ones any time soon.
Keep your eyes open for a good used machine and keep stashing money aside. Let your local dealers, guilds, and LQS's know you're on the lookout. Check websites such as houseofhanson.com, longarmuniversity.com, and Yahoo's Sew It's For Sale group for good deals. In the meantime, see if there is a place near you where you can rent time on a machine. Spending a few hours on one will give you the best idea what YOU want and need in a machine/frame setup. It's all well and good to ask others what they think, but in the long run, only you know what's best for you.
Good luck!!
